Copperline Energy

Private

Houston-based energy-storage startup building long-duration iron-air battery systems for utility-scale grid deployments. Runs pilot with two ERCOT-adjacent municipal utilities.

Founders Marcus Johnson

CEO Marcus Johnson

Company

Founded

2024

Headquarters

Houston, United States

Financials

Total Funding

$14M

Sectors

Climate Tech Hardware

copperlineenergy.com

Funding History

1 round

Seed Jul 13, 2026

$14M

Breakthrough Energy Ventures (Lead) Lowercarbon Capital Congruent Ventures

Funding data is compiled from multiple independent sources including company announcements, press coverage, and regulatory filings. While we strive for accuracy, amounts and dates may reflect reported figures at time of announcement.